We are offering an assortment of external grinding spindles which are formulated using superior quality raw material. Our range of grinding spindles is dynamically balanced and assembled with special grease which ensure high speed & longer service life. Available in many customized sizes, we offer these spindles at market leading prices. The spindles offered by us are quality tested by our experts and are known for features like quality and durability.

We offer grinding Spindles which are basically used for Deep Hole Grinding. Available varying sizes, shapes and specifications, these are internal grinding spindle that are used to serve needs of many industrial processes. The taper grinding we provide have applications in many machinery tools such as grinding wheels for precision, size and surface finishing. 

Usage:

These spindles can be mounted on bore grinding machines and Toolpost grinders of lathe machine. Application of deep hole grinding spindle is to grind long dia bores.

Features:

These are made to suit job dia 50 mm to 500 mm, length 100 mm to 1500 mm depending upon the configuration of job. Standard designs can be quoted on request.

Belt Driven Internal Grinding Spindles are used for various grinding applications. They are best accommodated to the places where there is sufficiency of space because the belts require certain space. Now-a-days these spindles are available in variety of sizes and models in compact designs. 

Usage:

These Belt Driven Spindles are manufactured for internal Grinding operation for small medium & large dia bores. These are suitable for Indian as well as imported machines.

Features:

Mostly these spindles are grease lubricated for long life but oil mist, oil jet and oil dipped lubrication spindles can also be manufactured on request. The standard models of spindles can be used on standard internal grinders having 60,80,100 & 125 diameters etc.

Under our category of milling spindle, Belt Driven Milling Spindles are well known ones having wide variety of usage in industry. These milling machine spindles are very versatile, which have varying speed and power range. These spindles have strong built and balance is always maintained while operation. 

Designs Available:

Dia of milling spindle is 100 to 300 mm, length from 200 mm to 600 mm, RPM upto 10,000.

Features:

These spindles are made with internal taper shafts of ISO, BT, HSK standard taper etc. Variable RPM can be achieved with the help of stepped pulley or change of pulley.

We are the leading manufacturer and exporter of belt driven drilling spindles which are used in a number of industries. These Belt Driven Spindles are especially designed as per the specifications of clients. Widely used for drilling purposes, these feature better thrust capacity, long service life, sturdy construct etc.

Features:

Different drilling spindles have different drilling capacities depending on the application
Drilling spindles can be gear driven or belt or motorized driven
High-frequency drive spindles
Round body, cartridge, or block spindle housing

We are engaged in offering an extensive range of Belt Driven Turning Spindles which are playing an important role in many industries like production, mining, agriculture, packaging. These are widely used in horizontal or vertical lathes and turning centers. Our professionals are monitoring quality parameters to ensure best quality products.

Features:

Spindle is mounted on super precision angular contact bearings
Accurate rotation control
Different designs are available for standard speeds and maximum stiffness

Advantages :

High cutting forces
High productivity
Flexibility
Robust and compact
Thermally stable behavior

Our range of belt driven boring spindles is a popular category of spindles used in numerous applications in different types of industries. They are designed to do boring in various materials and surfaces. In each and every boring machine tool spindle is the most important component responsible for its performance. Boring spindles are designed for use in boring which implies the machining of an internal diameter in the work piece.

Features:

Fitted with angular contact bearing
Bearings are grease lubricated for long life
Vibration and noise free
High surface finish value

Some spindles are espically designed for rotating elements & machines. Rotating spindles are very special spindles applicable for specified work and jobs. These metal spindles are used for grinding, milling, boring and special purpose machines. 

Usage:

These spindles are used for rotation to jobwork only. These metal spindles are applicable for vertical or horizontal dynamic balancing machines, Glass clamping and polishing machines.

Designs Available:

All these spindles are having special designs and made as per customers' requirement. 

Features:

Spindle size and RPM can be selected on the basis of job configuration.

CAPITAL's Motorized Grinding Spindles

Capital is manufacturing precision motorized spindles for over 15 years. We emphasis on quality, accuracy and on time delivery which makes Capital's Spindles the best choice for your production needs.

We specialize in precision fitting custom built AC Induction motors to the spindle shaft. Precision balancing of these units provides high accuracy and high-speed capability. A temperature controlled assembly and inspection area and state-of-the-art coordinate measuring machines.

Horsepower ­ Heat Dissipation

Motor horsepower (HP) is a function of the size and the RPM of the motor. The larger the motor, the greater the horsepower at a given RPM.

Motors that generate greater heat loss can be cooled with a fan that blows air over the motor. These motors are classified TEFC (totally enclosed fan-cooled.) When even greater horsepower is required in a smaller package, TELC (totally enclosed liquid-cooled) motors are used. These motors are cooled by circulating liquid around the motor.

Capital has many years of experience in the design and application of precision motorized spindles. For more information you may please contact


Variable Frequency Drives

Capital supplies motorized spindles for any speed up to 75,000 RPM. To operate at speeds other than 900, 1200, 1800 or 3600 RPM, a variable frequency drive is required. Variable frequency drives must be carefully matched to the motors they drive. Motors and variable frequency drives have pre-determined volts-to-hertz ratios, and these ratios must match for a successful application. Speed control can be integrated into your machine control for ramp-up, ramp-down and adjustment. This can be included in your machine program code or as an electrical control switch or dial

Spindle Lubrication

High speed spindles require special bearing lubrication. Capital’s air/oil lubrication systems injects precise amounts of oil at controlled intervals for optimal bearing life and minimum heat generation. Utilizing only fractions of a drop per cycle means no environmental oil mist concerns. In addition the high air pressures used provide maximum protection against contamination of the spindle.

As the name suggest, Surface Grinding Spindles are designed for surface grinding. These grinding spindles are especially fabricated for some special applications. They can be categorized as high frequency driven grinding spindle, motorized grinding spindle or belt driven grinding spindle.

Usage:

These are suitable for surface grinding machines, and special applications.

Designs Available:

Spindles can be manufactured as per the customer's requirement.

Features:

These spindles are manufactured with integrated 3 phase motor upto 40 H.P.

We are manufacturers, suppliers and exporters of High Frequency Spindles. They are used as Internal Grinding Spindles. These spindles are specially designed for grinding. Grinding Spindles are used in any machine for high productivity and surface finishing. These grinding spindles are made of stainless steel alloy.

Usage of Capitals Hi-Frequency Spindles :

Capitals Hi-Frequency Spindles are used for internal grinding applications, where high speed and high accuracy is required. We claim our Spindles accuracy within 2 Microns. Hi-Frequency spindles are also helpful in getting high productivity and better surface finish. Capitals Hi-Frequency Spindles have Integrated motor design which eliminates gears and pulleys, and thus make it, compact.

All the rotating parts are dynamically balanced and tested with latest measuring equipments to get vibration free performance.


Main Advantages of Using Capital's Hi-Frequency Spindles are:

Increased part output
Improved surface finish
Integrated motor design eliminating gears and pulleys
Compact design
High torque and high power values
High rotational speed
Very high axial and radial stiffness values
High metal removal rates
Angular position and speed control sensors
Automatic Tool Change systems
Temperature sensors
Accelerometers, Ability to interface to a wide number of drives and frequency converters